I designed a board using an LT1666 and I am wondering which value does the DAC holds at startup.
It seems to me that is powers up at 0xFFFF.
The datasheet is lacking this information.
Someone is currently looking into your query and will respond as soon as possible.
The LTC1668 will startup in an unknown state. When the first clock pulse is given the output will reflect what the code is on the inputs.